Crystals of twinned Chalcopyrite are aesthetically dotted over a high pearly lustered rhombic crystal Dolomite matrix. The Chalcopyrite twinned crystals measuring to 1cm, have a slightly iridescence's to them with a metallic yellow colour. On the underside of the specimen there are further crystals of Chalcopyrite on Dolomite. The specimen is provinced from the English county of Devon, it is not possible to be more precise than this.